130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: mcclock_ioasic.c,v 1.8 1997/09/02 13:20:14 thorpej Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/clockvar.h>
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#include <dev/dec/mcclockvar.h>
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#include <alpha/tlsb/gbusvar.h>
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#include <alpha/tc/tcreg.h>
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#include <alpha/tc/tcvar.h>
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#include <alpha/tc/tcdevs.h>
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#include <alpha/tc/ioasicreg.h>
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#include <alpha/tc/ioasicvar.h>
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#include <dev/dec/mc146818reg.h>
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struct mcclock_ioasic_clockdatum {
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u_char datum;
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char pad[3];
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};
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#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
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/*
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* Registers are 64 bytes apart (and 1 byte wide)
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*/
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#define REGSHIFT 6
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struct mcclock_ioasic_softc {
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unsigned long regbase;
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struct mcclock_ioasic_clockdatum *sc_dp;
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};
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static int mcclock_ioasic_probe(device_t dev);
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static int mcclock_ioasic_attach(device_t dev);
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static void mcclock_ioasic_write(device_t, u_int, u_int);
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static u_int mcclock_ioasic_read(device_t, u_int);
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static device_method_t mcclock_ioasic_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, mcclock_ioasic_probe),
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DEVMETHOD(device_attach, mcclock_ioasic_attach),
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/* mcclock interface */
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DEVMETHOD(mcclock_write, mcclock_ioasic_write),
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DEVMETHOD(mcclock_read, mcclock_ioasic_read),
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/* clock interface */
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DEVMETHOD(clock_init, mcclock_init),
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DEVMETHOD(clock_get, mcclock_get),
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DEVMETHOD(clock_set, mcclock_set),
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{ 0, 0 }
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};
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static driver_t mcclock_ioasic_driver = {
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"mcclock",
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mcclock_ioasic_methods,
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sizeof(struct mcclock_ioasic_softc),
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};
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static devclass_t mcclock_devclass;
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int
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mcclock_ioasic_probe(device_t dev)
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{
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device_set_desc(dev, "MC146818A real time clock");
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return 0;
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}
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static int
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mcclock_ioasic_attach(device_t dev)
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{
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struct mcclock_ioasic_softc *sc = device_get_softc(dev);
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struct ioasic_dev *ioasic = device_get_ivars(dev);
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sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasic->iada_addr;
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mcclock_attach(dev);
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return 0;
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}
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void
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mcclock_ioasic_write(device_t dev, u_int reg, u_int datum)
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{
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struct mcclock_ioasic_softc *sc = device_get_softc(dev);
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sc->sc_dp[reg].datum = datum;
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}
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u_int
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mcclock_ioasic_read(device_t dev, u_int reg)
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{
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struct mcclock_ioasic_softc *sc = device_get_softc(dev);
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return (sc->sc_dp[reg].datum);
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}
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DRIVER_MODULE(mcclock, ioasic, mcclock_ioasic_driver, mcclock_devclass, 0, 0);
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